import router from './router'
import { constantRoutes } from '@/router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/login'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {

  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      NProgress.done()
    } else {
      const hasGetUserInfo = store.getters.name
      if (hasGetUserInfo) {
        next()
      } else {
        try {
          // get user info
          const userinfo = await store.dispatch('user/getInfo')

          // 根据 用户信息的 角色 筛选路由表

          const roles = [userinfo.role];
          
          // 符合 当前用户权限的路由筛选出来
          const newRouters = []


          constantRoutes.forEach(element => {
            
            const rs = element.meta && element.meta.roles
            if(rs != undefined && rs.length > 0){
              rs.forEach(r => {
                for (const index in roles) {
                  if (roles.hasOwnProperty(index)) {
                    const ur = roles[index];
                    if(r == ur){
                      newRouters.push(element)
                    }
                  }
                }
              });
            }else{
              newRouters.push(element)
            }
          });
          // debugger
          //router.addRoutes()
          
          // 新的路由表
          // 从新设置  -  设置路由  

          //router.options.routers = newRouters
          router.options.routes = newRouters
          router.addRoutes([...newRouters])

          // debugger
          //next()
          next({ ...to, replace: true })
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else if(to.path === '/signup'){
      next()
      NProgress.done()
    } else {
      // other pages that do not have permission to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
